Term ends Oct 11, 2043 · High confidence
20-year base term ends Dec 10, 2040
Held by Surmodicsst, Incorporated
Filed Dec 10, 2020 as application 17/118,143 · Granted Feb 4, 2025
Base term plus 1035 days of patent term adjustment (USPTO delay)
Today
2020
2043
Clock starts
Dec 10, 2020
Dec 10, 2020
Term ends
Oct 11, 2043
Oct 11, 2043
Granted
Feb 4, 2025
Feb 4, 2025
base term
patent term adjustment
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
1,035
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
This patent's term runs 1035 days past its 20-year base term on prosecution delay. 0 of 3 maintenance fees are paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Dec 10, 2020, when this application, 17/118,143, was filed | Dec 10, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1035 days, USPTO patent term adjustment record | Oct 11, 2043 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 11, 2043 | High confidence |
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| May 11, 2021 Reel 56197, frame 635 | Work, William James; Gould, Raymond Joseph; Patel, Dhruv; Hergenrother, Robert W. | Biocoat, Inc. | Assignment of Assignor's Interest |
| Oct 4, 2022 Reel 61697, frame 424 | Work, William James; Gould, Raymond Joseph; Patel, Dhruv; Hergenrothr, Robert W | Biocoat, Incorporated | Corrective Assignment to Correct the Assignee's Name Inside the Assignment Document and on the Cover Sheet Previously Recorded at Reel: 056197 Frame: 0635. Assignor(S) Hereby Confirms the Assignment. |
| Nov 1, 2022 Reel 61609, frame 774 | Biocoat, Incorporated | BMO Harris Bank N.A., as Collateral Agent | Security Interest |
| Nov 1, 2022 Reel 61615, frame 577 | Biocoat, Incorporated | Alter Domus (US) LLC | Security Interest |
| Nov 11, 2022 Reel 62171, frame 303 | Work, William James; Gould, Raymond Joseph; Patel, Dhruv; Hergenrother, Robert W | Biocoat, Incorporated | Corrective Assignment to Correct the the 4TH Inventors Last Name Previously Recorded at Reel: 056197 Frame: 0365. Assignor(S) Hereby Confirms the Assignment. |
| Nov 23, 2025 Reel 73768, frame 342 | Alter Domus (US) LLC | Biocoat, Incorporated | Release of Security Interest Recorded at 061615/0577 |
| Nov 23, 2025 Reel 73768, frame 769 | BMO Bank N.A. (F/K/A BMO Harris Bank N.A.) | Biocoat, Incorporated | Release of Security Interest Recorded at Reel/Frame 061609/0774 |
| Jan 21, 2026 Reel 73528, frame 447 | Biocoat, Incorporated | Bank Of Montreal, As Collateral Agent | Security Interest |
| Mar 5, 2026 Reel 75046, frame 105 | Biocoat, Incorporated | Surmodicsst, Incorporated | Change of Name |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Oct 2043
Term ends Oct 11, 2043. Maintenance fees still fall due before then
Note
The 1035 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.